Gui4Cli is a text based script language,
so you will need a good text editor to write those scripts with. The default SciED, which is written itself in Gui4Cli (see below) and is
included in the Gui4Cli distribution.

SciED
- (click for web page).
This is itself written in Gui4Cli, using the Scintilla editor, providing syntax
highlighting and folding of Gui4Cli and many other languages.